Wrench



H. L. OSMENT.

WRENCH.

APPLICATlON FILED JUNE 26. 1918.

1,334,392. Patented Mm .23,192o.

2 SHEETS-SHEET l.

WITNESSES //v VENTOR v Haw g1, Us mefl/ aim H. L. OSMENT.

WRENCH.

APPLICATION FILED JUNE Z6| 1918.

1,334,392, Patented Mar. 23, 1920.

2 SHEETSSHEET 2.

WITNESSES INVENTOH f/arrylasmenf illl CFC

UNITED STATES PATENT OFFICE.

HARRY LUMPKIN OSMENT. O'F GARTERSVILLE, GEORGIA.

WRENCH.

To all ir/iom may concern.

Be it known that I, Hal-air L. Osurnv'r, a citizen oi? the UnitedStates, and a resident or tartersville, in the county of Bartow andtltate of Georgia, have invented a new and .lmproved \Vrench, of whichthe following is a fulh clear, and exact description.

This invention relates to wrenches and has tor an. object the provisionof an improved construction of wrenches ot' the general type. of monkeywrench with an in1- jn'oved. raised portion or cam for causing agripping oit'the jaws on various shaped. objects when power is applied.

Another object in view is the provision of a handle having a raised cammember and an adjustable jaw formed with a rack bar handing the smoothedge of the rack bar littin against the rounded cam portion whereby onejaw may rock in respect to the other during the gripping action.

A. further object in view is to provide a wrench. having an adjustingscrew for the 1111 able jaw which may be quickly discom nected from themovable 'jaw for providing a quick adjustment otthe movable jaw over aconsiderable distance.

In the accompanying drawings:

Figure 1 is a side view of the wrench disclosing an embodiment of theinvention.

Fig. 2 is a section through Fig. 1. on line 2-2.

Fig. 3 is a transverse sectional. view through Fig. 1 on line 3--3.

Fig. l is a perspective view of a springretaining plate.

Fig. 5 is a fragmentary perspective view oi the screw retainingcasing.

Fig. 6 is a view similar to Fig. 1 showing; a sligl'rtly modified formoi the invention.

Fig. 7 elosin a further modified form of the invention.

Referring to the accompanying drawings b numerals 1 indicates a handlewhich is provided with a stationary jaw 2 and with. a curved raised.portion or cam 3 struck on an are so as to extend from the stationaryjaw 2 to the point t. A screw casing 5 is hinged at 6 on handle 1 andnormally straddles the earn 8, there being a stirrup 7 at the bottom.oi? the casing 5 for the spring; 8 whereby the shank 9 on. the movablejaw 10 is held. against the cam. The shank 9 is slidingly titted intopassageway 11 of the casing 5 so that the smooth. lower edge will engagethe a. view similar to Fi 6, but dis- Specification vfLetvelslatentPatented lll|31523,1920.

Application filed June 525.53, 1918.

Serial No. 242.037.

cam 3 and the toothed upper edge 1: will be in position to engage thethreads of the screw 13. These threads are preferably of the buttresstype and the teeth 12 are formed so as to conform to the shape of thesepar ticular threads. An opening lt is provided. in the upper part of thecasing 5, said opening being cut away at 15 and 1G for receivin the endsof the plate 17 which plate is hold in place by suitable screws 1.8 and1.9 projecting through apertures in the plate l7 and into threadedapertures in the casing A pair of guiding lugs 20 and 21 are provided onplate 17 through which the overlapping;- ends of spring 22 are placedwhen the parts are assembled as shown in Fig. 11. Opening 14.. isprovided with runrays or grooves and 2a in which the pin of screw 13tits whereby said screw may move toward and from the teeth 12 as may benecessary. The shank 9, however. cannot move away from the cam 3 as theteeth would bear against the shoulders 26 and 9.7. The screw 13 may hegrasped by the fingers ot' the operaim' and pulled directly away fromthe teeth 12 so that the shank 9 and aw 10 may be moved back and forthto the desired position and then screw 13 allowed to move under theaction of spring 22 back into engagement with the teeth, after this hasbeen done the screw could be rotated for producing a final adjustment itsuch adjustment is desired.

In operation when the parts have been properly adjusted. to a givenarticle the handle 1 is then moved for rotating the article andwhenmoved in one direction will cause the outer end 28 to move toward jaw 10as the handle rocks the cam 3 whereby the article will be properlygripped during the time power is applied to the wrench. A reverse actionof handle 1 will, oi course, more the jaw in an outward direction andpro duce a proper releasingaction. When assembling the parts the screw13 is first phiced in position with its guiding pin 15 and then springQlds placed in position at ter which plate 17 secured in place as shownin Fig. 1, whereupon all the parts are locked. in proper position, butmay be readily removed whenever desired.

in Fig. 6 a slightly modified form of the invention is shown in whichthe casing 5' is connected rigidly to the handle 1 by rivets or othersimilar fastening means 29. This will prevent an independent making ofthe handle and allow a slight rocking movement of the shank 9, as saidshank loosely fits into passageway 11.

In Fig. 7 a further modified form of the invention is shown in which thehandle 1 provided with a flat upper surface 30 against which the smoothflat lower surface of the shank 9 fits, casing 5 and associate parts,however, being the same as in the preferred structure so that noadditional description will be necessary. It will be noted, however,that in this figure there is no rocking movement of either the shank S)or the handle 1, though the screw 13, spring 22 and plate 17 are allformed similar to that shown in F l and act in a similar manner forpermitting a quick adjustment of shank 9 or a slow adjustment as may bepreferred.

What I claim is:

1. -A wrench of the character described comprising a handle providedwith a sta 'tionary jaw at one end, a movable jaw coacting with thestationary jaw provided with a shank having threads on the back thereof,said shank extending substantially parallel with said handle, said shankbeing movable longitudinally of the handle and also rock able so thatthe jaws may move toward and from each other in a direct line orpivotally, a cam on said handle near said stationary jaw having a smoothsurface against which said shank bears and on which said shank rocks, acasing pivotally mounted on the handle and positioned to straddle saidhandle, said casing acting to hold the shank in position on said camwhile allowing a free reciprocatory and rocking motion thereof, saidcasing having an opening adjacent said shank and a groove on each sideof the opening, a screw member positioned in said open ing and normallyengaging the teeth on the back of the shank, a journal extending throughsaid screw member with the ends extending into said grooves so as to beguided thereby, and a spring for resiliently holding the screw inengagement with the teeth on the back of said shank.

2, A wrench of the character describec comprising a handle provided witha stationary aw, a movable aw provided with a shank extendingsubstantially parallel with the handle, a casing engaging the handlestraddling said shank and part of the handle for guiding the shank inits movement, said shank having teeth on the edge opposite that engagingthe handle, said casingrhaving an opening extending from the endopposite that engaging the handle downward until part of the teeth onthe shank are exposed, a groove arranged on each side of said open ing,a screw member arranged in said opening for normally engaging saidteeth, a pin arranged 1n said screw member having the end positioned insaid grooves so as to guide the screw member in a movement toward andfrom said teeth, a spring acting on said screw member for normallyholding the same in engagement with said teeth, and a retaining plateconnectcd to the open end of s: id casing forming depending lugs forholding the spring in place.

3. A wrench oi the character described comprising a handle provided witha, stationary jaw on the end, an arc-shaped cam arranged on said handleadjacent said stationary jaw, a shank provided with a movable jawextending at right angles to the shank, said shank normally extendingsubstantially parallel to said handle and rest ing on said-cam wherebyit may rock as well as move longitudinally, said shank having teeth onthe edge opposite that engaging the same, said teeth having one faceperpendicular to the general direction oi the shank and the other edgeat an angle thereto, a casing pivotally mounted on said handle andstraddlin said shank, said casing provided with an opening, a screwmcmbcr rotatably and slidably mounted in said opening, said screw memberhaving buttress threads co-acting ith the teeth on said shank, and aspring for resiliently urging said screw member toward said shank, theconstruction of said buttress threads and said teeth being such that bypressing on the outer end of said movable aw it will close or movetoward the stationary jaw, said teeth slipping over the threads oi thescrew member.

4. A wrench of the character dcscribml comprising a handle, a stationaryjaw counectcd with the handle, a cam arranged on the back of said handleadjacent the stationary jaw, saie cam being arc-shaped, a movable jawhaving a shank extending parallel with the handle and positioned to rockon said cam and reciprocate thcreover, said shank having teeth thereonacting as threads, said teeth being on the opposite side to thatengaging; said cam, means for holding the shank in position, a screwnormally engaging said teeth but capable of movement toward and "fromsaid teeth, and means for normally holding said screw in engagement withthe teeth whereby the movable jaw may be adjusted in both directions bysaid screw and may be moved bodily-toward the stationary jaw by a pushon the movable jaw to vard the stationary jaw.

5. A wrench oi the character described comprising a handle provided witha stationary jaw at one end, a movable jaw coacting with the stationaryjaw provided with a shank having threads on the back thereof, said shankextending parallel with said handle, said shank being movablelongitudinally of handle and also rockable so that the jaws may movetoward and from each other in a direct line or pivotally, a cam on saidhandle near said stationary jaw ill against which said shank bears andon which said shank rocks, a caslng pivotally inoiu'ited on said handleand positloned to straddle said handle and said shank, said casingholding the shank in position on said cam while allowing a treerr-zciprooatory and rocking movement thereof, a screw bodily movabletnwam a from the threads on said shank, and a spring acting on saidscrew it'or nrinall causing the same to remain in engagement with saidthreads, the threads on the screw being buttress threads and the threadson the shank being threads of the same type whereby a push on themovable jaw toward the stationary jaw will bodily move the movable jawto a closed position.

('1, A wrench comprising a handle provided with a stationary jaw at oneend and an arcshaped cam on the back positioned adjacent the jaw, amovable jaw coacting with the stationary jaw and provided with a shankhaving a rack on the back thereof, said shank extending substantiallyparallel with said handle, said shank being movable longitudinally oithe handle and rockahle on said cam from. a practically parallelposition with said handle until the end of the shank opposite the jawwill approach the handle for increasing the distance between the jaw onthe shank and the jaw on the end or? the handle while the extreme endoi? the movable jaw moves away from the fixed jaw. a casing pivotallymounted on the hantile and positioned to straddle said handle and cam,said frame acting to hold said shank in position on said cam while allowing a tree rocking motion thereof, said casing having an openingadjacent said shank, and a groove on each side of the opening, screwmeans positioned in said opening and normally engaging the teeth of saidrack, journal means extending from said screw means with the endsextending into said grooves so as to be guided thereby, and a spring forholding the screw means in engagement normally with the teeth on saidyank. said spring yielding in a direction away from said rack whenpressure is brought to bear on the screw means in the same directionwhereby the shank is allowed to move -freely in either direction, thethreads on said screw means and the teeth. 'd rack being such that bypressing on the outer end of said movable jaw said movable jaw willclose toward said stationary jaw, said threads sliding over the teeth onsaid rack while the screw means will prevent ,the movement of themovable jaw in the opposite direction.

'7. it wrench oi? the character described coniiprising a handle providedwith a fixed jaw at one end and an integral arc-shaped cam at the jawend of the handle, the axis or the cam extending in a direction normalto the side of the handle, a movable jaw slidingly mounted and alsorockably mounts ed on said cam, said jaw having a shank provided withbutts. ss threads or teeth on the back, a casing straddling the handlenear the fixed jaw, means for pivotally awarding the casing on thehandle, said means h iing positioned adjacent one edge of the casing, anadjusting member having buttress threads meshing with. said rack, a flatspring acting on aid adjustable member for cruising the threar s tonormally remain in engagement with the threads of the rack while beingcapable of bodily removal therefrom, and a flat spring rigidly securedto said handle and engaging the lower part of said :l'ralne for normallyholding the frame in a given position and said shank parallel with saidhandle.

8. A wrench of the character described comprising ahandle provided witha stationary jaw and a bearing surface, a movable jaw provided with ashank extending substantially parallel with the handle and slidingly androckably mounted on the hearing surface of said handle, a casingengaging the handle and straddling said shank and part of the handleilior guiding the shank in its novr-ni'ieut, said shank having teeth onthe edge opposite that engaging said bearing surface, an openingadjacent said shank extending downward until part oil. the teeth on theshank are exposed, and a groove on each side of the opening, screw meanshaving luittress threads meshing with the teeth oi? said rack, a springfor normally holding said screw means in operative engagement with saidrack, which by compression permits the lifting of the screw means fromthe 'ack for allowing the shank to pass freely through the casing ineither direction, the buttress threads on said screw means and theteeth. on the rack acting in such a manner as to permit the shank andmovable aw to be moved so that the movable jaw will approach thestationary jaw when the movable jaw has been pressed. against an objectwhile preventing said movable jaw and shank moving in the oppositedirection.

9. A. wrench of the character described comprisiiii a handle formed witha stationary jaw, an arc-shaped cam, a movable jaw provirfled with ashank extending substantially parallel with the handle rockably andslidin mounted. on said can), a casing engaging the handle andstraddling said shank and part of the handle for guiding the shank inits movement, said shank having teeth on the edge opposite that engagingthe handle,

said casing having an opening opposite said shank extending downwardlyuntil part of the teeth on the shank are exposed, and a groove arrangedon each side of said opening, a screw member arranged in said openingfor normally engaging said teeth, a

journal memberextending from each end of the screw member into saidgrooves to guide the screw member toward and from said teeth, a springacting on the screw member for normally holding the same inengagementwith said teeth, said spring projecting into said grooves so as to heguided thereby, a second spring secured to said handle on the oppositeside to that carrying said shank, said second spring being positioned tobear against part of said easing for retaining normally both jaws inpractically a parallel position. said second spring yielding when saidshank is forced to rock on said cam in such a direction as to cause therear end of said shank to approach more closely said handle, the screwmember being held in yielding contact by said lirstanentionml springwhereby the shank may slide in one direction and is prevented fromsliding in the opposite direction \\'l1ile being capable of being forcedin either direction upon the operation of said spring member.

HARRY LUMPKIN ()SMEN'J.

